It's no secret Kenny Chesney has partied with former Van Halen frontman Sammy Hagar in Cabo San Lucas, Mexico, but his friendships apparently extend to the band's namesakes. Edward and Alex Van Halen joined Chesney onstage during his show Saturday (June 17) at the Home Depot Center just outside Los Angeles. Edward, of course, played guitar, and Alex climbed behind the drums while Chesney handled vocals on the classic Van Halen hit "Jump" and the band's version of the Kinks' "You Really Got Me."